CVE-2024-21595 Information

Description

An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based unauthenticated attacker to cause a Denial of Service (DoS).

If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured this causes a deadlock of the PFE and results in the device becoming unresponsive. A manual restart will be required to recover the device.

This issue only affects EX4100 EX4400 EX4600 QFX5000 Series devices.

This issue affects:

Juniper Networks Junos OS

21.4R3 versions earlier than 21.4R3-S4;
22.1R3 versions earlier than 22.1R3-S3;
22.2R2 versions earlier than 22.2R3-S1;
22.3 versions earlier than 22.3R2-S2 22.3R3;
22.4 versions earlier than 22.4R2;
23.1 versions earlier than 23.1R2.

Reference

https://advisory.juniper.net/JSA75734 https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N